The system was working fine for a long time.
The system is very slow and randomly freezes. I have run malwarebytes on it and cleaned up some malware but it still reports errors.
Attempts to go into safe mode are stopped by a message that windows prevented the boot to prevent damage to the system with error 7e. It boots normally into xp sp3.
I was thinking of running chkdsk without repair to see if the hard disk reports errors. If it does, I am thinking of saving it and then trying to a chkdsk /r.
What is the likely cause of the problem?